Lathe-turret.



W. L. FAY.

LATHE TURRET.

APPLICATION FILED APR. I9. 1915.

MMIII/HEHE coLUMHIA PLANocIR/IPH co.. WASHINGTON. D. c,

WINTHROP LINCOLN FAY, 0F DEXTER, MAINE.

LATHE-TURRET.

Application filed April 19, 1915.

T0 all whom it may concern Be it known that I, VINTHROP LINCOLN FAY, of Dexter, in the county of Penobscot and State of Maine, have invented certain new and useful Improvements in Lathe-Turrets, of which the following is a specifica tion.

My invention relates t0 turret lathes and particularly to certain improvements in the construction of the turret patented to Norman I-I. Fay by Letters Patent No. 639,892 dated Dec. 26, 1899. In the lathereferred to the turret was turned from one position to the next position in order by the single reciprocation of a hand lever. The motion of this lever in one direction unlocked the turret and the motion in the opposite directionl rotated it toa new position and locked it there. Anothermotion of the same lever clamped it firmly in place in its new position. The mechanism included a central stud on which the turret was'journaled, the turret having on its under side a locking ring with external notches and internal teeth and a horizontally disposed turret locking bolt adapted to engage the external notches. On the upper end of the stud was a nut connected with an operating handle and above the nut and secured to the stud was a disk 0 having a notch engaged by a locking bolt on the lever. At the lower end of the stud was a turret revolving cani having a caln surface formed to disengage the locking bolt from the external notches of the locking ring and carrying a pawl for engaging the internal teeth of the ring.

According to my present invention I make the stud stationary with a nut and its handle lever at its vupper end; the turret revolving cam instead of being secured to the lower end of the stud I now secure to the lower end of a sleeve which fits over the fixed stud. The locking bolt on the hand lever instead of engaging a disk on the upper end of the stud now engages a notch in the upper end of the sleeve which carries the turret revolving cam. Again, the pawl carried by the cani instead of engaging internal ratchet teeth formed in the ring is now so located as to engage the same notches which are engaged by the turret locking bolt. Finally, the locking bolt at the base of the turret which in my former machine extended out horizontallyinto the space required for turning large diameters, is now inclined so Specicaton of Letters Patent.

Patented A110. 24, 1915.

Serial No. 22,249.

as to bring its outer end as far as possible away from the axis of the lathe.

My invention may best be understood by reference to the accompanying drawing in which is shown a turret and its connecting yparts constructed in accordance with my present invention.

In the drawing Figure 1 is a central vertical section on the line x fr of Fig. 3, Fig. 2 is a section on the line of Fig. 1, Fig. 3 is a section on the line y y of Fig. 1, Fig. 4 is a plan of the turret revolving` cam, Fig. 5 is a section on the line zu of Fig. 4, Figs. 6 and 7 are elevations and plan ot' the pawl, Fig.` 8 is a plan of the ring and Fig. 9 is a section on the line m of Fig. 8.

Referring to the drawing, the slide 1 carries a ixed upright stud 2 over which fits a sleeve 3. The turret 4 is mounted so as to turn on the sleeve 3. The stud 2 has on its upper end a nut 5 to which is connected the handle lever 6 having the hand controlled spring locking bolt 7 The nut 5 extends over and incloses the upper end of the sleeve and in the latter is formed a notch or opening to receive the inner end of the bolt 7 On the lower end of the turret is secured the ratchet ring 8 having exterior notches 9,' the ring being positioned to surround and inclose the turret revolving cam 10 which is secured to the lower end of the sleeve 3 beneath the turret and within a space formed in the top of the slide. rIhe turret locking bolt l1 is slidably mounted in the slide and its inner end engages the external notches 9. The lower portion of the inner end of the bolt l1 extends well down below the lower surface of the ring so that it may be acted upon to be released by the cam l() which is secured as stated, to the lower end of the sleeve 3.

The outer end of the bolt 11 is located at a lower level than the inner end in order to leave as much space as possible between it and the lathe center and interfere as little as possible with the use of the lathe on large work.

The operative portion of the cam 10, designated as 10a, lies just below the ring 8 and it is so formed that when it is rotated its operative edge will strike the inner end of the bolt 11 and force it out of engagement with the notch 9.

The cam 10 has pivoted to it in a radial recess 10b a pawl 12 formed with an upwardly extending Adog 120V on its end this dog being formed and positioned so as to. enter.,

the notches 9 from the under side.

The general principles upon which-my lathe are constructed and its mode of operation are the saine as in the former patent referred to and the parts which I have omitted to speciiically describe are substantially the same.

In operating the turret the lever is pushed back to release the nut land the movement is continued until the bolt 7 engages the opening in the upper end of the sleeve. The lever is now pushed back turning the cam until it strikes the innerk end of the bolt 11 and disengages it from thefnotchv 9. When this takes place, the pawl l2v will have reached a point directly beneath one of the notches the pawl and the operative portion of the edge of the cam being'spaced apart the same distance as the interval between the notches. The lever' is now reversed, the pawl snaps into its notch fromvthe under side and the ring and turret are turned until the bolt ll snaps into the next notch. The bolt 7 is now withdrawn from engagement with thevsleeve by the action of the thumb piece 13 and the nut is tightened by a iurther movement of the lever. The ,turret is thus iirmly clamped in position until the next change is made.

The improved construction which I have shown and described in the lathe makes it stronger, simpler and less expensive to build and the result is a much more efficient tool.

Iclaim; s

l. In a turret lathe, the combination of a slide, a vertically disposed stud thereon, a nut on the upper end of said stud, a handle for operating said nut, a sleeve fitting over said stud, a hand controlled latch bolt in said handle adapted to engage the upper end of the sleeve, a turret journaled ,on said sleeve, a ratchet ring on the under sideof said turret, having external notches, a spring-pressed locking bolt adapted to engage said notches, a turret revolving cam secured to the lower end of said sleeve, said cam being formed and positioned to disengage said locking bolt and a pawl carried by said cam for engaging said ratchet ring.

2. In a turret lathe the combination of a slide, a vertically disposed stud thereon, a

nut on the upper end of said stud, a handle lever for operating said nut, a sleeve tting over said stud, a hand controlled bolt in said handle lever adapted to engage the upper end of said sleeve, a turret journaled on said sleeve, a ratchet ring on the under side of said 'turret having external notches, a spring-pressed locking bolt adapted to engage said notches, a turret revolving cam secured to the llower end of said sleeve, said cam being formed and positioned to disengage said locking-bolt and a pawlcarried by said cam beneath said ring. for engaging said notches. 'f

3. In a turret lathe the combination of a slide, avertically disposed stud thereon,

. a nut kon lthe upper end of said stud, a han dle lever for operating said nut, a sleeve iitting over said stud,"a hand controlled bolt in said handle lever adapted to engage the upper end of said sleeve, a turret journaled on said sleeve, a ratchet ring on the under side of said turret having external notches,

a spring pressed locking bolt adapted to engage said notches, a turret revolving I Vcam secured to the lower end of said sleeve, said cam being formed and positioned to dise-rr gage said locking bolt and having'therein a radial slot, a pawl pivoted in` said radial slot positioned to engage said notches `from the under side of the ring.

Il. In a turret lathe-the combination of a slide, a vertically disposed stud thereon, a nut on the upper endl'of said stud, a handle lever for operating said nut, a sleeve tting over 'said stud, a hand controlled' bolt on said'handle lever adapted to engage the upper endoi said sleeve, a turret journaled on said sleeve, a ratchet ring on the under side of said turret having externalv notches, a spring pressed locking bolt adapted 'to engage said notches, said bolt inclining downwardly from its innerto its outer end, a

turretrevolving cam secured to the lowerend of said sleeve, said cam being formed and positioned to release said locking bolt and a pawl carried by said cam vforengaging said ratchet ring.'

In testimony whereo'I have aiiixed my signature, in presence of two witnesses.

WINTHROP LINCOLN yFAY.

Witnesses:

F. D. DEARTH, P. A. HASTY.

Copies of this patent may be obtanedffor ve cents each, by addressing the Commissioner-of Patents Washington, ."D. C. 

